Highly Diastereo- and Enantioselective Additions of Homoenolates to Nitrones Catalyzed by <i>N</i>-Heterocyclic Carbenes
作者:Eric M. Phillips、Troy E. Reynolds、Karl A. Scheidt
DOI:10.1021/ja710521m
日期:2008.2.1
diastereo- and enantioselective addition of N-heterocyclic carbene-generated homoenolates to nitrones is reported. This formal [3 + 3] addition of α,β-unsaturatedaldehydes and nitrones generates unusual morpholinone heterocycles which are converted into γ-hydroxy amino esters by addition of methanol to the reaction. The use of a chiral N-heterocyclic carbene (NHC) as the catalyst provides the amino esters